Doughnuts and sugary pastries. They're packed with sugar, which Giancoli says may be linked to the development of wrinkles.

Hot dogs, bacon, and pepperoni. Processed meats are usually high in saturated fats and have nitrates in them. Both of those can lead to inflammation.

Fatty meats. These are also high in saturated fats. The key with meat is to keep it lean. Tenderloin cuts tend to be leaner. Look for ground beef that is at least 95% lean. Ground turkey breast and chicken breast are other lean options.

Alcohol. Moderate drinking may be good for your heart, but heavy drinking can rev up the aging process. "Moderate" is one drink per day for women (such as a 5-ounce glass of wine or 12-ounce glass of beer) and two drinks for men.

"These also have B vitamins in them, like thiamine and riboflavin, which are important for skin as well," Giancoli says. If you don't get enough, it can give you rashes and make your skin look scaly, she says.

Go for a variety and make this way of eating a habit.

"If you're not getting enough of the good stuff on a regular basis, you won't be able to produce healthy new skin cells in the way that you should," Giancoli says.